JPH0498293A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To obtain an excellent resonance effect by providing this electronic instrument with a volume correction instructing part. CONSTITUTION:A volume correction data reading control part 61 in the volume correction instructing part 9 refers to and reads out volume correction data ADJ stored in a volume correction data storing part 62 based upon keycode data KC. An envelope signal generated from a resonance tone envelope signal generating part is multiplied by the output data of a resonance sound waveform reading control part 14 and the output data ADJ of the instruction part 9 through a multiplier. Since output data WD1 from a musical tone signal generation part 4 and the output data WD2 of the generation part 14 are supplied to a sound system 6, added and D/A converted and the converted analog signal is amplified and discharged, matching between the musical tone signal and the resonance sound signal can be improved and the sound level and sound pressure changes of resonance sound of an original real instrument can be more faithfully expressed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to electronic musical instruments, and more particularly to electronic musical instruments that achieve resonance effects.

BACKGROUND OF THE INVENTION In recent years, digitalization of electronic musical instruments has progressed, and many products have been developed that output musical sounds that imitate the sounds of live musical instruments, such as electronic pianos and electronic organs. By the way, the sound of a live musical instrument is given various resonance effects resulting from the structure of the instrument itself. For example, in the case of a piano sound, not only the strings that are struck by the string, but also the strings that are not struck, the soundboard, etc., resonate inside the piano body, and when the damper pedal is turned on, the damper is removed from the strings, causing the sound to change. The sensation of spreading increases. Several electronic musical instruments have been proposed to achieve these effects (for example, Japanese Patent Laid-Open No. 63193185 and Japanese Patent Laid-Open No. 64-91193).

Referring to Figure 6 below, we will explain how the conventional electronic musical instrument has three bases and seven. explain about.

As shown in FIG. 6, the electronic musical instrument includes a keyboard 101 for specifying musical tone information such as the pitch and volume of a musical tone, and a switch 102 for specifying on/off of a resonance effect (such as a bass pedal or a damper pedal). , a musical tone signal generator 104 that generates a musical tone signal in response to a control signal from a CPU (central processing unit) 103 that detects the states of the keyboard 101 and the switch 102 and generates a control signal, and a musical tone signal generator 104 that generates a musical tone signal in response to a control signal from the CPU 1o3. A resonance effect adding section 1o5 and a resonance effect adding section 10 that add a resonance effect to the output of the musical tone signal generating section 104.
The sound system 106 includes an amplifier and a speaker that amplifies the output of the 5 and outputs it as a musical sound.

The relationship and operation of each of the above components will be explained below.

When a key is pressed on the keyboard 101, the CPU 103 detects the key press and outputs key code data KC indicating the pitch, touch level data KT indicating the strength of the key touch, and a key-on signal KON indicating key press and key release information. issue as. (KON=1 when key is pressed; KON=O when key is released). Also C
The PU1o3 also detects the state of the switch 102, and outputs the state signal SON of the switch 102 if there is a change in the state of the switch 102. Musical tone signal generator 10
4 generates a musical tone signal corresponding to the key code data KC1 touch level data KT output from the CPU 103, the key-on signal KON, and the state signal SON of the switch 102.

FIG. 7 shows an example of an envelope shape of a musical tone signal output from the musical tone signal generating section 104 in response to the key-on signal KON and the state signal SON of the switch 102.

For example, the state signal SON of the switch 102 is off (SON
=O) and the key-on signal KON changes from off to on to off (KON=Q to 1 to 0), the envelope shape is as shown in El.

In addition, the state signal SON of the switch 102 is on (5ON
= 1), the key-on signal KON turns off → on → off (KON20 → 1 → O),! :strange([.

The envelope shape in this case is E2.

5/ The duration of the envelope after the key is released (KON=1→0) is much longer in envelope shape E2 than in envelope shape E1. That is, switch 102
When it is on, the musical tone signal has a long lingering sound after the key is released.

The resonance effect adding section 106 is the switch 1 of the CPU1o3 output.
If the status signal SON of 02 is in the ON state (SONl), a resonance effect is added to the musical tone signal output from the musical tone signal generating section 104, and if it is in the OFF condition (SONO), the musical tone signal of the musical tone signal generating section 104 is bypassed. do. If the musical tone signal is an analog signal, a delay device using a spring-type busbup device or a BBD delay element is used to add the resonance effect, or if the musical tone signal is a digital signal, a digital filter and a delay circuit are used to add the resonance effect. A device is used that performs DA (digital-to-analog) conversion after adding .

The musical tone signal output of this resonance effect adding section 105 is output from an amplifier,
is supplied to a sound system 106 consisting of speakers,
It is emitted as a musical sound.

Page 6 Problems to be Solved by the Invention However, with the above configuration, for example, when expressing the damper pedal effect of a piano, not only the strings that are struck by the strings, but also the strings that are not struck, the soundboard, etc. The expansive feeling created by resonance inside the main unit is achieved by changing the envelope shape after the key is released in synchronization with the damper pedal on, and in synchronization with this, various reverb devices are used to add a υ resonance effect. However, it is not possible to faithfully express the unique resonant sound that occurs when the impact sound of a hammer is transmitted through unstruck strings and soundboards. That is, there was a problem in that the resonance effect generated from the structure of the acoustic musical instrument itself was not faithfully imparted.

The present invention solves the above-mentioned conventional problems, and aims to provide an electronic musical instrument that can faithfully impart resonance effects caused by the structure of an acoustic musical instrument.

Means to solve problems To achieve this objective, the electronic musical instrument 7B of the present invention.

The control signal generator includes a control signal generator that generates a control signal that instructs the pitch and intensity of the musical tone, the start and stop of sound generation, and a resonance state, and a control signal that instructs at least the pitch and intensity of the musical tone and the start and stop of sound generation. a musical tone signal generating section that generates a musical tone signal in response to a signal; a resonance signal generating section that generates a resonance signal in response to at least a control signal indicating a resonance state among the control signals; The apparatus includes a volume correction instruction section that instructs the resonance signal generation section to correct the volume of the resonance signal in response to a control signal that instructs the pitch.

According to the above configuration, the present invention generates a musical tone from the musical tone signal generating section in accordance with the control signal generated from the control signal generating section, and also adjusts the control signal and volume correction generated from the control signal generating section. Since the arrangement is such that the resonance sound is generated from the resonance sound generation section in response to an instruction from the instruction section, a desired resonance effect can be obtained.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an electronic musical instrument according to an embodiment of the present invention. The electronic musical instrument shown in FIG. 1 has a keyboard 1 for specifying musical tone information such as the pitch and strength of musical tones. A switch 2 for specifying on/off of the resonance effect (e.g., sustain pedal, damper pedal, etc.), a CPU (central processing unit) 3 that detects the states of the keyboard 1 and switch 2 and generates a control signal. Musical tone signal generation section 4 that generates musical tone signals according to control signals
゜Volume correction instruction unit 9 generates volume correction data for the resonance signal in response to a control signal from the CPU 3; generates a resonance signal in response to the control signal from the CPU 3 and volume correction data from the volume correction instruction unit 9; Resonant sound signal generator 14.
The outputs of the musical tone signal generator 4 and the resonance signal generator 14 are added together, DA converted, and amplified.

It is composed of a sound system 6 that emits sound.

The relationship and operation of each of the above components will be explained below.

When a key is pressed on the keyboard 1, the CPU 3 detects 96 key presses and outputs key code data KC indicating the pitch, touch level data KT indicating the strength of the pitch, and a key-on signal KON indicating key press and key release information. Output.

The CPU 3 also detects the on state of the switch 2, and outputs a state signal SON of the switch 2 according to the state of the switch 2.

The musical tone signal generating section 4 has an internal configuration as shown in FIG. 2, for example. Although each section operates in a time-division manner for polyphonic (multiple tones) output, the operation for one channel will be described here for convenience.

The musical waveform selection control section 21 selects a waveform to be read out according to the key code data KC and touch level data KT from the CPU 3, and sends out waveform selection data WS1. The musical tone waveform address data generating section 22 generates address data AD1 in response to the key yoke data KC and key-on data KOH from the CPU 3. Here, as a method of determining the pitch of a musical tone, there are a method of changing the updating speed of address data and a method of changing the read width of address data, but either of these methods may be used in this embodiment. . The tone waveform storage section 23 stores a plurality of tone waveform data, and the tone waveform readout control section 24 stores the waveform selection data WS1 sent from the tone waveform selection control section 21.
Then, the specified waveform data is read out by the address pigeon AD1 generated by the tone waveform address data generation section 22. In addition, the musical tone envelope signal generation section 25 includes:
It generates an envelope signal that controls the amplitude of the waveform as time passes, and generates an envelope ff1tED1 determined by the key code data KC and touch data KT from the CPU 3 at the timing of the key-on signal KON=1. Here, in the conventional example, the envelope shape after KON=o was changed by the state signal SON of the switch 102 (FIG. 7), but in this embodiment, a similar change may or may not be made. You can. This envelope signal E D 1 is multiplied by the output data of the musical waveform readout control section 2411 in the multiplier 26 .

The volume correction instruction unit 9 has an internal configuration as shown in FIG. 3, for example. Here, as with the musical tone generating section 4, for convenience, the operation for one channel will be explained.

The volume correction data read control unit 61 reads the volume correction data storage unit 62 according to the key code data KC from the CPU 3.
Refer to the volume correction data ADJ stored in and read it out. Regarding the volume correction data stored in the volume correction data storage section 62, one data may be referred to for each key code data, or several key code data may refer to the same volume correction data. .

The resonance signal generator 14 has an internal configuration as shown in FIG. 4, for example. Here, as with the musical tone generating section 4, for convenience, the operation for one channel will be explained.

The resonance waveform selection control unit 31 selects a waveform to be read out according to the key code data KC and touch level data KT from the CPU 3, and outputs the waveform selection data WS2. The resonance sound waveform storage unit 33 stores a plurality of types of resonance sound waveforms. This method does not have to deal with differences in the direction in which the resonant sound travels, the position of the soundboard, and the medium in which it resonates depending on the range, as in the case of a piano. Instead, resonant sounds with different conditions such as range and strength are sampled in advance, and the resonant sound waveform is memorized. By storing the waveform in the section 33, the optimum waveform corresponding to the key code pig KC and touch level data KT can be read out. An example of a method for collecting resonance sounds is, for example, in the case of a piano, by completely muting only the strings struck by a hammer, striking the strings, and recording and collecting the resonance sounds generated. The resonance waveform address generator 32 receives the key code τ code data KC, key-on data KON, and the state signal SON of the switch 2 from the CPU 3.
Although the address data AD2 is generated in accordance with ).

To 13-7 The resonance waveform readout control section 34 is the resonance waveform selection control section 3
The designated waveform data is read out using the waveform selection data WS2 from 1 and the address data AD2 from the resonance waveform address data generation section 32. The resonance envelope signal generator 35 still receives the key code data KC from the CPU 3.

Touch data KT, key-on signal KON, switch 2
An envelope signal FD2 determined by the state signal SON is generated, an example of which is shown in FIG. Key-on signal K when switch 2 is on (SON=1)
When ON changes from off to on (KONO → 1), the envelope rises in synchronization with the on of the key-on signal KOH like El, and the key-on signal KON turns on (KONO → 1).
Switch 2 is turned off with N=1) (5ON=1→O)
It decreases rapidly when Furthermore, the resonant sound waveform readout control unit 34 detects the start of the rise of the envelope E1 (SON
-1 and KON=1), waveform output starts at the same time.

1. When switch 2 is off (SON=0), if the key-on signal KON changes from off to on (KON-○→1), the envelope will not rise and the key-on signal KON will turn on ( When switch 2 is turned on (SON-o→1) to the trench of KON=1),
Accordingly, the envelope rises like E2.

However, here, the amplitude of the envelope is controlled by the time from when the key-on signal KON is turned on until the switch 20 is turned on, and the longer the time, the smaller the amplitude becomes. Note that the resonance sound waveform readout control section 34
starts outputting the waveform at the same time as the envelope E2 starts rising. When the key is released while switch 2 remains on (
KON = 1 → ○), the duration of the envelope is much longer than that of envelope E1, and the sound has a long aftertaste, but if switch 2 is turned off in the middle (SO
N = 1 → 0), and from that point on it rapidly attenuates.

The envelope signal ED2 generated in this way is
A multiplier 36 multiplies the output data of the resonance waveform readout control section 34 and the output data ADJ of the volume correction instruction section 9 .

To 15-7 In this way, the output data WD from the musical tone signal generator 4
1 and the output data WD2 from the resonance signal generator 14 are supplied to the sound system 6, added, DA-converted, and then amplified and emitted.

As described above, according to this embodiment, by providing the resonance signal generation section 14, which generates a unique resonance signal caused by the structure of an acoustic musical instrument, separately from the musical tone signal generation section 4, a unique It is possible to realistically express the sound of live instruments, including the resonance of the sound.

In addition, since resonant sounds are usually not sensitive to pinch fluctuations, the pitch change caused by the key code data KO is a gradual change in the musical tone signal (for example, it corresponds to a pitch change of a semitone or 100 cents in the musical tone signal). The pitch change of the resonant sound waveform is 25 cents), or the pitch change of the resonant sound waveform is stopped. In this case, for example, in the case of a piano, the matching between the musical sound signal and the resonance signal becomes worse as the distance from the key code data of the key from which the resonance sound waveform was actually collected, and the volume and texture of the resonance sound become worse due to the structure of the instrument itself. Because of the change, the resonance sound waveform should originally change for each key, but a range that is impossible to express by pitch change has appeared, but we refer to the key code data KC and instruct the volume correction of the resonance signal. By providing the volume correction instruction section 9, it is possible to better match the musical tone signal and the resonance signal, and to more faithfully express the pitch and sound pressure changes of the resonance tone inherent in all musical instruments. be.

In this embodiment, as shown in FIG. 6, when the key-on signal KON=1 and the state signal SON21 of the switch 2,
The resonance sound envelope signal starts rising and the resonance sound waveform output starts at the same time.When KON=1, the envelope and waveform output starts, and depending on whether SON is 0 or 1, the envelope level is changed. It is also possible to control the level ↓ (for example, when 5ON=o, the level is suppressed to 1/4).

Furthermore, in this embodiment, for convenience, only one channel of the musical tone signal and one channel of the resonance signal are shown. That's 17 bases. In this case, musical tone signal generating section 4. Resonant sound signal generator 1
4 may perform time-sharing processing independently, or may perform time-sharing processing by combining musical tone signal generating section 4 and resonance signal generating section 14. At this time, the number of channels that can produce simultaneous sounds (for example, 16 channels/I/) can be allocated to each arbitrary number of channels/I/ for musical tone signals and resonance signals (for example, for musical tone signals = 16 channels, For resonance signal = 1 channel/I/). However, data for a plurality of channels may be mixed at any given point using an accumulator or the like. Regarding the readout control of the waveforms in the musical tone signal generation section 4 and the resonance signal generation section 14, it is possible to not only read out the stored waveform data one after another, but also to repeatedly read out one period of waveform data. After reading out, various reading methods can be implemented, such as reading out other waveforms while performing smooth interpolation.

In addition, in this embodiment, the output signal WD of the musical tone signal generator 4
1 and the output signal 18B-7WD2 of the resonance signal generator 14 are directly input to the sound system 6, but as shown in the conventional example, a resonance effect adding section is provided before the sound system 6. You can also do that. in this case,
The resonance effect can be added to the musical tone signal and the resonance signal simultaneously, or can be controlled and applied separately. Further, the addition rate can also be changed depending on the state of the switch 2.

Effects of the Invention As is clear from the above-described embodiments, the present invention provides a control signal generating section that generates control signals for instructing the interval and intensity of musical tones, start and stop of sound generation, and resonance state; a musical tone signal generating section that generates a musical tone signal in accordance with a control signal that instructs the pitch and strength of the tone and the start and stop of sound generation;
a resonance signal generating section that generates a resonance signal in response to at least a control signal that instructs a resonance state among the control signals; and a volume of the resonance signal in response to a control signal that instructs at least the pitch of a musical tone among the control signals. Since the sound volume correction instructing unit is provided to instruct the resonance signal generating unit to perform correction, it is possible to generate a unique resonance signal caused by the structure of the acoustic musical instrument in addition to the musical tone signal. It is now possible to express subtle changes in resonance due to differences in the pitch of musical tones. Therefore, compared to previous attempts to obtain the resonance of a raw chestnut instrument only by applying a resonance effect to the musical sound signal, electronic musical instruments that have been given a resonance effect that is far superior in terms of fidelity and naturalness. can be provided.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an electronic musical instrument according to an embodiment of the present invention, FIG. 2 is a configuration diagram of a musical tone signal generation section of the electronic musical instrument, FIG. 3 is a configuration diagram of a volume correction instruction section of the electronic musical instrument, and FIG. Figure 4 is a configuration diagram of the resonance sound generation section of the electronic musical instrument, Figure 5 is a diagram of the shape of an envelope generated from the resonance envelope generation unit of the electronic musical instrument, and Figure 6 is a configuration diagram of a conventional electronic musical instrument. FIG. 7 is an envelope waveform diagram of a musical tone generated from a musical tone signal generator in a conventional electronic musical instrument. 1...Keyboard, 2...Switch, 3...
...CPU. 4... Musical tone signal generation section, 9... Volume correction instruction section, 14... Resonance sound signal generation section.

Claims (3)

[Claims] (1) A control signal generating unit that generates a control signal that instructs the pitch and strength of a musical tone, the start and stop of sound generation, and a resonance state, and a control signal that instructs at least the pitch and strength of a musical sound and the start and stop of sound generation among the control signals. a musical tone signal generating section that generates a musical tone signal in response to a control signal that indicates a resonance state; a resonance signal generating section that generates a resonance signal in response to at least a control signal indicating a resonance state among the control signals; An electronic musical instrument comprising: a volume correction instruction section that instructs the resonance signal generation section to correct the volume of the resonance signal in accordance with a control signal that instructs at least the pitch of a musical tone. (2) The electronic musical instrument according to claim 1, wherein the musical tone signal generating section and the resonance signal generating section have a plurality of sound generation channels. (3) The electronic musical instrument according to claim 2, wherein the number of sound generation channels of the resonance signal generation section is smaller than the number of sound generation channels of the musical tone signal generation section.